of the lecture on the 2nd International Conference "Hypoxia in Medicine" A number of studies have demonstrated that short term global and focal brain hypoxia in experimental animals has a clear protective effect and reduces the injury to the neurons in repeated ischemic exposure. (Kitagawa K. et al., 1991; Glazier S. et al., 1994; Matsushima K., Hakim A., 1995) . These phenomena were called "hy...